LOL - thanks all. So here is a stupid question. When I drop a pinch of this food in there... how do I know it's enough? Does seem like they are eating it all within 10min... but some of it floats around and then lands on rocks where they can't get to it fast enough....

Guess I better read up on when, how much and how often i should be feeding these guys!

A hungry fish is a healthy fish. I feed mine every 2 -3 days. It's mostly gone within 5 minutes, though they continue hunting though the rock and on the sand for at least an hour before they go back to their normal patterns.

If it takes 10 minutes for them to get most of it then it might be too much.